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Maintenance And Service; Operating Instructions - Maytag POF1HD140AVFA Installation, Operation And Maintenance Manual

Oil fired warm air furnaces, up-flow model with ecm
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20. MAINTENANCE AND SERVICE

Routine Maintenance By Home Owner
Other than remembering to arrange for the annual
professional servicing of the furnace by the service or
installation contractor, the most important routine service
performed by the homeowner is to maintain the air filter
or filters. A dirty filter can cause the furnace to over-heat,
fail to maintain indoor temperature during cold weather,
increase fuel consumption and cause component failure.
The furnace filter(s) should be inspected, cleaned or
replaced monthly. The furnace is factory equipped with a
semi-permanent type filter. If the filter is damaged,
replace with filters of the same size and type. (See Parts
Listing Ref. No. 21).
During the routine service, inspect the general condition
of the furnace watching for signs of oil leaks in the vicinity
of the oil burner, soot forming on any external part of the
furnace, soot forming around the joints in the vent pipe,
etc. If any of these conditions are present, please advise
your service or installation contractor.
Annual Service By Contractor
THE COMBUSTION CHAMBER (FIREPOT) IS
FRAGILE. USE CARE WHEN INSPECTING AND
CLEANING THIS AREA.
The heat exchanger should be inspected periodically and
cleaned if necessary. If cleaning is necessary, SHUT
OFF POWER TO THE FURNACE and remove the
burner. Using a stiff brush with a wire handle, brush off
scale and soot from inside the drum and flue pipe. To
clean the radiator, remove the clean-out caps screws,
and remove the caps carefully to avoid tearing the
gaskets. A wire brush can be used to loosen dirt and
debris on the inside surfaces of the radiator. Clean out all
accumulated dirt, soot and debris with a wire handled
brush and an industrial vacuum cleaner. Before replacing
the clean-out caps, inspect the gaskets. If the gaskets
are broken, remove the remnants and replace with new
gaskets.
The blower motor is factory oiled and permanently
sealed.
DO NOT LUBRICATE. Excess oil causes
premature electric motor failure.
Inspect the blower fan. Clean if necessary.
Oil Burner Maintenance: Follow the instructions of the oil
burner manufacturer. (See oil burner manufacturer's
instructions supplied with furnace or burner). It is
advisable to change the oil burner nozzle and oil filter on
an annual basis.
The venting system should be cleaned and inspected for
signs of deterioration. Replace pitted or perforated vent
pipe and fittings. The barometric damper should
open and close freely.
All electrical connections should be checked to
ensure tight connections. Safety controls such as
the high limit controls should be tested for
functionality. The fan control should be checked to
ensure that the fan on and off delay function
continues to start and stop the blower fan at the
optimal settings.

21. OPERATING INSTRUCTIONS

(POF1HD140AVFA and POF1HD091AVFA)
Before Lighting
Open all supply and return air registers and grilles.
Open all valves in oil pipes. Turn on electric power
supply
To Light Unit
Set the thermostat above room temperature to call
for heat. The burner should start. NOTE: It may be
necessary to press the RESET button on the
primary combustion control relay.
There will be a fan on time delay before the
circulating
fan
Technologies 1168-1 has an adjustable fan on/off
time delay that is programmed into the ECM motor,
and is set by selecting the SW4 DIP switch
combination displayed in Table A-10 page 15. Fan
on/off delay must be adjusted according to input
(nozzle size).
Set the thermostat below room temperature. The oil
burner should stop.
The air circulation blower will continue to run until
the blower off delay setting programmed into the
ECM motor times out.
To check the operation of the limit switch, shut off
power to the furnace. Temporarily remove the 5 pin
power connector plug from the ECM blower motor.
NOTE: Isolate the AC Line pins on the 5 pin
power connector with electrical tape to prevent
electric shock hazard.
power to the furnace and set the thermostat above
room temperature.
After three or four minutes of burner operation, the
limit control should turn the burner off. When the
limit function test is complete, shut off electrical
power to the furnace, replace the 5 pin power plug to
the blower fan motor, and then restore power. The
blower fan will start up immediately. Once the
temperature has dropped and the limit control has
reset, the fan will operate until the fan off time is
achieved. The oil burner will then resume operation
and continue until the thermostat is satisfied.
8
is
energized.
The
Restore the electrical
United

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